Seam for fourdrinier wires.



1. 0. WATSON.

SEAM FOR FOURDRINIER WIRES.

APPLICATION FILED APR.21,1913.

LMWMQW Pawmed June 22, 1915.

WITNESSES INVEN T0]? 1HE NORRIS PETERS (30., PHUTO-LITHQ, WASHINGTON Dv C.

JOHN D. WATSDN, 0F APPLETON, WISCONSIN.

SEAT/L FOR FOURDRINIER WIRES.

Specification of Letters Patent.

Patented June 22, 1915.

Application filed April 21,1913. Serial No. 762,648.

T all whom it may concern:

Be it known that I, JOHN D. WATSON, a

citizen of the United States, residing at Ap-' pleton, in the county of Outagamie and State of Wisconsin, have invented certain new and useful Improvements in Seams for Fourdrinier Wires, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a connecting means or seam for use in Fourdrinier wires, and has for its object the production of an eflicient seam especially adapted to the needs of paper mills making light-weight paper, such as tissue of any nature. From practical experience the sewing of the wires up to this time has made a tendency to fill up the meshes between the stitches to a great extent and a free flow of water through the seam has been prevented.

The present invention, therefore, has for its object the production of a seam which will not retard the passage or flow of water through the seam, and thereby will allow the formation of a sheet of paper without caus- .ing the same to be made weak at the place where the paper comes in contact with the connection of the wire mesh.

With the above and other objects in view this invention consists of certain novel combinations, constructions, and arrangements of parts as will be hereinafter fully described and claimed.

In the accompanying drawings :Figure 1 is a plan view of a portion of the wire stitching or connecting seam showing the wires in large scale for the purpose of clearly illustrating the same. Fig. 2 is a section taken on line 22, of Fig. 1. Fig. 3 is a 49 section taken on line 33, of Fig. 1.

By referring to the drawings it will be seen that the improvement in this invention lies in the construction of a seam wherein the seam is formed to contain the minimum amount of sewing and yet possess the desired amount of strength. Heretofore the connecting of the wire by means of the seam has required in most cases three times the amount of sewing as illustrated in the present instance to possess the same amount of strength.

In connecting the two pieces of wire the two ends 1 and 2 of the wire cloth are butted together after the ends have been cut parallel with and between two of the weft wires 3, 4c, 5 and 6. The longitudinally extending wires 7 and 8 of the respective pieces of wire cloth are formed so as to extend longitudinally of each other, and then the sewing wire 9 is interwoven over the wires 3, 4c, 5 and 6 and laced together thereby. The sewing wire is folded so as to extend between two of the horizontally extending wires and is then crossed over so as to extend between the next pair of horizontally extending wires of the opposite piece of wire cloth as illustrated clearly in Fig. 1. The central cross portion 10 of the sewing wire 9 is crossed over the ends of the horizontally extending wires 7 and 8. The sewing wire is then passed down under the pieces of wire cloth and is crossed in an opposite direction as indicated at 11 to the cross portion 10 of the sewing wire. These crossing portions 10 and 11 of the sewing wire will constitute a firm connecting portion and also a substantial continuation of the warp wires and at the same time will allow the free passage of the water through the wire at this connecting joint.

From the foregoing description it will be seen that a very efficient connecting means has been produced for connecting the two pieces of wire mesh together without adding additional stitches and also without reducing the strength to the connection. Furthermore, the present device will allow the free passage of water through the wire mesh at the joint as above stated and for this reason a great advantage has been produced. It is a well known fact that the filling of the seam causes the free passage or flow of the water to be prevented and thereby leaves a streak across the paper or tissue with little fiber. This will cause the tissue to break from the lack of suflicient body of the paper, thereby making it necessary to run the machine at a very slow rate of speed, and consequently reducing the output of paper per day. The location and lay of the sewing wire, from practical experience, has been found to have considerable to do with the filling up of the seam, and for this purpose the seam has been made so as to allow free passage of water and also to allow a smooth surface at the joint to prevent the marking or cutting of the paper.

Having thus described the invention what is claimed as new, is

A seam for Fourdrinier wires, comprising a pair of wire mesh sections, each section comprising weft and warp wires, a lacing Wire passing over the last tWo Weft Wires of each adjoining Wire mesh section, said lacing Wire extending parallel with and fitting snugly between the Warp Wires for the distance of the two last Weft wires and held against lateral movement thereby, and said lacing Wire crossing between the abutting ends of the Warp Wires of the adjacent sections at an angle of approximately 45 for producing a strong and perfectly smooth 10 seam between the adjacent ends of the two sections of Wire mesh fabric.

In testimony whereof I hereunto aflix my signature in presence of two witnesses.

, JOHN D. WATSON. Witnesses:

HUMPHREY PIERCE, I. S. BRUNSCHWEILER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0; 

